Water Entry of A Wedge Into Waves in Three Degrees Offreedom

The hydrodynamic problem of a two-dimensional wedge entering into a nonlinear wave in three degrees of freedom is investigated based on the incompressible velocity potential theory. The problem is solved through the boundary element method in the time domain. To avoid numerical difficulties due to a...

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Bibliographic Details
Published inPolish maritime research Vol. 26; no. 1; pp. 117 - 124
Main Authors Sun, Shi Yan, Chen, Hai Long, Xu, Gang
Format Journal Article
LanguageEnglish
Published Gdansk Sciendo 01.03.2019
De Gruyter Poland
Subjects
auxiliary function method
Boundary element method
Computational fluid dynamics
Coordinate systems
Coordinates
Dependence
Hydrodynamics
Mathematical analysis
Nonlinear waves
Potential theory
three degrees of freedom
Time domain analysis
Velocity potential
Water entry
Waves
Wedges
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Summary:The hydrodynamic problem of a two-dimensional wedge entering into a nonlinear wave in three degrees of freedom is investigated based on the incompressible velocity potential theory. The problem is solved through the boundary element method in the time domain. To avoid numerical difficulties due to an extremely small contact area at the initial stage, a stretched coordinate system is used based on the ratio of the Cartesian system in the physical space to the distance travelled by the wedge in the vertical direction. The mutual dependence of body motion and wave loading is decoupled by using the auxiliary function method. Detailed results about body accelerations, velocities and displacements at different Froude numbers or different waves are provided, and the mutual effect between body motion and wave loading is analysed in depth.
ISSN:2083-7429
1233-2585
2083-7429
DOI:10.2478/pomr-2019-0013